Answer:
He should obtain between 1350 and 1950 kilocalories from carbohydrates.
Explanation:
To get to this result, I did some calculations that I will write down below.
3000 kcal (total kilocalories) / 100 (total percent) * 45 (the wanted percentage) = 1350 kcal.
This means that 1350 is the 45% of 3000.
Following the same thinking, I calculated the 65% of 3000:
3000 kcal / 100 * 65 = 1950 kcal.
Therefore, if Shawn has to intake between 45% and 65% of kilocalories in carbohydrates, he should ingest between 1350 and 1950 kcal in carbs.